Malicious PDF — malware analysis report

Static analysis result for SHA-256 78bc2eb959054637…

MALICIOUS

PDF

44.0 KB Created: 2021-05-21 10:07:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 340fdbed201aaeb679cbda920243c085 SHA-1: ae314eb59f5593416b5328b944df87d6629542cb SHA-256: 78bc2eb9590546371eda432f9dda7b822c987640febab5d0a96d03f007422c8c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as generators for popular games like Roblox. The document body explicitly mentions 'Roblox Hack Unlimited Robux' and includes a call to action to access a generator. The heuristics confirm the presence of malicious redirector links and a lure for game hacks. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7947

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/431946152/roblox-hack-unlimited-robux-game-hack In PDF document text
    • http://5prudov.ru/images/how-to-generate-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://5prudov.ru/images/roblox-re_GM431946152.pdfIn PDF document text
    • http://5prudov.ru/images/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • http://5prudov.ru/images/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://5prudov.ru/images/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000361b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x361B 25852 bytes
SHA-256: 1563790c1ef38cc34a8a56145c52cd8814c09124371d7198f82fbbed98b30b34
font_01_sfnt_off00006f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F6E 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00007953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7953 6100 bytes
SHA-256: f866077ce59d6ea276f75e4af76daa2aab5f3a1a679df144776123d85664d65c
font_03_sfnt_off000087df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87DF 19168 bytes
SHA-256: c229ae85f225584a05b8ae3a5d05ef5eb919d65508796bcf435d04f59e516df3

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